Support passing arrays as vararg argument

2 files changed, 23 insertions, 1 deletions

diff --git a/src/main/java/org/zwobble/couscous/frontends/java/JavaExpressionReader.java b/src/main/java/org/zwobble/couscous/frontends/java/JavaExpressionReader.java
index fcce1e1..e6b3822 100644
--- a/src/main/java/org/zwobble/couscous/frontends/java/JavaExpressionReader.java
+++ b/src/main/java/org/zwobble/couscous/frontends/java/JavaExpressionReader.java
@@ -317,7 +317,11 @@ public class JavaExpressionReader {
         ITypeBinding[] parameterTypes = method.getParameterTypes();
         return IntStream.range(0, parameterTypes.length)
             .mapToObj(index -> {
-                if (method.isVarargs() && index == parameterTypes.length - 1) {
+                boolean isVarargs =
+                    method.isVarargs() &&
+                    index == parameterTypes.length - 1 &&
+                    (javaArguments.size() != parameterTypes.length || !javaArguments.get(index).resolveTypeBinding().isEqualTo(parameterTypes[index]));
+                if (isVarargs) {
                     Type elementType = typeOf(parameterTypes[index].getElementType());
                     List<ExpressionNode> elements = IntStream.range(index, javaArguments.size())
                         .mapToObj(argumentIndex -> readExpression(elementType, javaArguments.get(argumentIndex)))
diff --git a/src/test/java/org/zwobble/couscous/tests/frontends/java/ExpressionReadingTests.java b/src/test/java/org/zwobble/couscous/tests/frontends/java/ExpressionReadingTests.java
index fb7a25b..408c390 100644
--- a/src/test/java/org/zwobble/couscous/tests/frontends/java/ExpressionReadingTests.java
+++ b/src/test/java/org/zwobble/couscous/tests/frontends/java/ExpressionReadingTests.java
@@ -268,6 +268,24 @@ public class ExpressionReadingTests {
     }
 
     @Test
+    public void canReadMethodCallsWithArrayAsVarargs() {
+        TypeParameter typeParameter = typeParameter(Identifiers.method(Identifiers.forType("java.util.Arrays"), "asList"), "T");
+        assertEquals(
+            methodCall(
+                staticReceiver("java.util.Arrays"),
+                "asList",
+                list(Types.STRING),
+                list(array(Types.STRING, list())),
+                parameterizedType(ScalarType.of("java.util.List"), list(Types.STRING)),
+                signature(
+                    "asList",
+                    list(typeParameter),
+                    list(Types.array(typeParameter)),
+                    parameterizedType(ScalarType.of("java.util.List"), list(typeParameter)))),
+            readExpression("java.util.List<String>", "java.util.Arrays.asList(new String[]{})"));
+    }
+
+    @Test
     public void canReadGenericStaticMethodCallsWithExplicitTypeParameters() {
         TypeParameter typeParameter = typeParameter(Identifiers.method(Identifiers.forType("java.util.Collections"), "emptyList"), "T");
         assertEquals(